neutron atomic mass

例句：

1. 1. Neutrons are the building blocks of matter.
   中子是物质的构成基石。
2. 2. The neutron star is a pulsar with an extremely high mass.
   中子星是一种质量极高的脉冲星。
3. 3.Neutrons are also used in nuclear reactors to produce energy.
   中子在核反应堆中用于产生能量。